Texas Instruments HDC3021 Bedienungsanleitung

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HDC302x 0.5%RH Digital Relative Humidity Sensor, 0.19%RH/yr Long Term Drift, 4s

Response, Low-Power, Offset Error Correction, 0.1°C Temperature Sensor

1 Features

•Relative humidity (RH) sensor:

–Operating range: 0% to 100%

–Accuracy: ±0.5% typical

–Offset Error Correction: reduces offset to return

device to within accuracy specification

–Long-term drift: 0.19%RH/yr

–Condensation protection with integrated heater

•Temperature sensor:

–Operating range: –40°C to 125°C

–Accuracy: ±0.1°C typical

–Long-term drift: ±0.03°C/yr

•NIST traceability: relative humidity & temperature

•Output Short Circuit Protection

•Low power: average current 0.4µA

•I

2

C interface compatibility up to 1MHz speeds

–Four selectable I

2

C addresses

–Data protection through CRC checksum

•Supply voltage: 1.62V to 5.50V

•Available auto measurement mode

•Programmable interrupts

•Programmable RH and Temp measurement offset

•Factory-installed polyimide tape assembly cover

•Factory-installed IP67 rated environmental cover

2 Applications

•Washer & dryer

•Refrigerator & freezer

•Industrial transport

•Cold Chain asset tracking & data logger

•IoT environmental sensors

•Air quality and gas detection

•Humidifier/dehumidifier

•Thermostat

•CPAP and ventilator

•Water leak detector

•IP Camera

RH Sensor

T Sensor

ADC

EEPROM

Linearization

I

2

C

SCL

SDA

ALERT

ADDR

ADDR1

RESET

GND

HDC30x

µC

GND

I

2

C

Controller

VDD

VDD

+V

supply

GPIO

Heater

Typical Application

3 Description

The HDC302x is an integrated, capacitive based

relative humidity (RH) and temperature sensor . The

device provides high accuracy measurements over

a wide supply range (1.62V – 5.5V) and ultra low

power consumption in a compact 2.5mm × 2.5mm ×

0.8mm WSON 8-pin package. Both the temperature

and humidity sensors are 100% tested and trimmed

on a production setup that is NIST traceable and

verified with equipment that is calibrated to ISO/IEC

17025 standards.

Offset Error Correction reduces RH sensor offset due

to aging, exposure to extreme operating conditions,

and contaminants to return device to within accuracy

specifications. For battery IoT applications, auto

measurement mode and ALERT feature enable low

system power by maximizing MCU sleep time. There

are four different I

2

C addresses that support speeds

up to 1MHz. A heater is available to dissipate

condensation and moisture.

The HDC3020 is an open cavity package without

protective cover. Two device variants have a cover

option to protect the open cavity RH sensor:

HDC3021 and HDC3022. HDC3021 has removable

protective tape to allow conformal coatings and

PCB wash. HDC3022 has a permanent IP67

filter membrane to protect against dust and water

condensation.

Package Information

PART NUMBERPACKAGE

(1)

PACKAGE SIZE

(2)

HDC3020

HDC3021

HDC3022

WSON (8)2.50mm × 2.50mm

(1)For more information, see Section 11.

(2)The package size (length × width) is a nominal value and

includes pins, where applicable.

RH (%RH)

RH Accuracy (%RH)

0102030405060708090100

-4

-3.5

-3

-2.5

-2

-1.5

-1

-0.5

0

0.5

1

1.5

2

2.5

3

3.5

4

0102030405060708090100

-4

-3.5

-3

-2.5

-2

-1.5

-1

-0.5

0

0.5

1

1.5

2

2.5

3

3.5

4

Typical

MIN/MAX

Relative Humidity (%RH) Accuracy

HDC3020, HDC3021, HDC3022

SNAS778D – JUNE 2021 – REVISED JULY 2024

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Produktspezifikationen